The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [ny.]11.20. not minimum weight yet ascertained. CUL-DAR55.70-71. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).

[70]

Not minimum ~~active~~ weight yet ascertained.

Probably previous not one touch when a gnat alight with a leg or cut Hair, have slight [movement] to weight &c.

Best believe thus with very certainty not 1/1000 of a grain —

Really less remarkable in Plant

Minute animals. — which catch by [illeg], must pursue far smaller object.

Hair Nov. 20

[calculations not transcribed]

[70v]

[calculations not transcribed]

[71]

We are left the conclusion that it is weight & prolonged.

(Weight on hairs which causes movement)

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)